人歯牙のエナメル質及び歯石の等電点 (Isoelectric Point) について

抄録

There are two methods to determine the IEP of teeth substance (ampholyte), one is the method by means of color stuff buffer, the other is electro-cataphoresis. Dental enamel and calculus contain many inorganic substances, and it is difficult to dye, therefore the electro-cataphoresis is a propriety which determine the IEP of the same. The author determined the IEP by means of microscopic electro-cataphoresis apparatus and he devised glass measurements tube.
The results obtained are as follows.
1. At the IEP of dental enamel 3.8 is the highest depending on the histogram. Its average value is 3.744 ± 0.024.
2. According individual age we find out the difference in second teeth: 0-30=1, 31-50=2, 51- =3, and the results is that there is no difference between 1-2, but we find out the difference between 2-3, 1-3, (the dangerous rate 10%) . We find out a conscious difference between the primary and second teeth, (dangerous rate 5%) .
3. There was no conscious and sexual difference between male and female, and the same is of alveolar pyorrhoe and caries teeth.
4. There was no difference among the teeth of same men, therefore you may think of some individual difference in them.
5. According to the histogram of dental calculus the 4.1 and 4.2 was same percentage, its average value is 4.13 ± 0.07.
6. There was no difference between the IEP of salivary calculus and serum calculus in my experimental results at least.
7. It seems to me that the formation factor of the dental calculus is related to the IEP of teeth and various ingredients in saliva.